<?php

namespace CMS\Controller\Admin;

use Admin\Base\ProtoController as Controller;

use CMS\Model\Category;

/**
 * 后台分类管理控制器
 * 
 */
class CategoryController extends Controller
{

    /**
     * 分类管理列表
     * 
     */
    public function index()
    {
        $tree = (new Category)->getTree(0, 'id,name,title,sort,pid,allow_publish,status');
        $this->assign('tree', $tree);
        C('_SYS_GET_CATEGORY_TREE_', true); // 标记系统获取分类树模板
        $this->meta_title = '分类管理';
        $this->display();
    }

    /**
     * 显示分类树，仅支持内部调
     * 
     * @param array $tree
     *            分类树
     */
    public function tree($tree = null)
    {
        C('_SYS_GET_CATEGORY_TREE_') || $this->_empty();
        $this->assign('tree', $tree);
        $this->display('tree');
    }

    /* 编辑分类 */
    public function edit($id = null, $pid = 0)
    {
        $Category = new Category;
        
        if (IS_POST) { // 提交表单
            if (false !== $Category->update()) {
                $this->success('编辑成功！', U('index'));
            } else {
                $error = $Category->getError();
                $this->error(empty($error) ? '未知错误！' : $error);
            }
        } else {
            $cate = '';
            if ($pid) {
                /* 获取上级分类信息 */
                $cate = $Category->info($pid, 'id,name,title,status');
                if (! ($cate && 1 == $cate['status'])) {
                    $this->error('指定的上级分类不存在或被禁用！');
                }
            }
            
            /* 获取分类信息 */
            $info = $id ? $Category->info($id) : '';
            
            $this->assign('info', $info);
            $this->assign('category', $cate);
            $this->meta_title = '编辑分类';
            $this->display();
        }
    }

    /* 新增分类 */
    public function add($pid = 0)
    {
        $Category = new Category;
        
        if (IS_POST) { // 提交表单
            if (false !== $Category->update()) {
                $this->success('新增成功！', U('index'));
            } else {
                $error = $Category->getError();
                $this->error(empty($error) ? '未知错误！' : $error);
            }
        } else {
            $cate = array();
            if ($pid) {
                /* 获取上级分类信息 */
                $cate = $Category->info($pid, 'id,name,title,status');
                if (! ($cate && 1 == $cate['status'])) {
                    $this->error('指定的上级分类不存在或被禁用！');
                }
            }
            
            /* 获取分类信息 */
            $this->assign('info', null);
            $this->assign('category', $cate);
            $this->meta_title = '新增分类';
            $this->display('edit');
        }
    }

    /**
     * 删除一个分类
     * 
     */
    public function remove()
    {
        $cate_id = I('id');
        if (empty($cate_id)) {
            $this->error('参数错误!');
        }
        
        // 判断该分类下有没有子分类，有则不允许删除
        $child = M('Category')->where(array(
            'pid' => $cate_id
        ))
            ->field('id')
            ->select();
        if (! empty($child)) {
            $this->error('请先删除该分类下的子分类');
        }
        
        // 判断该分类下有没有内容
        $document_list = M('Document')->where(array(
            'category_id' => $cate_id
        ))
            ->field('id')
            ->select();
        if (! empty($document_list)) {
            $this->error('请先删除该分类下的文章（包含回收站）');
        }
        
        // 删除该分类信息
        $res = M('Category')->delete($cate_id);
        if ($res !== false) {
            // 记录行为
            action_log('update_category', 'category', $cate_id, UID);
            $this->success('删除分类成功！');
        } else {
            $this->error('删除分类失败！');
        }
    }

    /**
     * 操作分类初始化
     * 
     * @param string $type            
     */
    public function operate($type = 'move')
    {
        // 检查操作参数
        if (strcmp($type, 'move') == 0) {
            $operate = '移动';
        } elseif (strcmp($type, 'merge') == 0) {
            $operate = '合并';
        } else {
            $this->error('参数错误！');
        }
        $from = intval(I('get.from'));
        empty($from) && $this->error('参数错误！');
        
        // 获取分类
        $map = array(
            'status' => 1,
            'id' => array(
                'neq',
                $from
            )
        );
        $list = M('Category')->where($map)
            ->field('id,pid,title')
            ->select();
        
        // 移动分类时增加移至根分类
        if (strcmp($type, 'move') == 0) {
            // 不允许移动至其子孙分类
            $list = tree_to_list(list_to_tree($list));
            
            $pid = M('Category')->getFieldById($from, 'pid');
            $pid && array_unshift($list, array(
                'id' => 0,
                'title' => '根分类'
            ));
        }
        
        $this->assign('type', $type);
        $this->assign('operate', $operate);
        $this->assign('from', $from);
        $this->assign('list', $list);
        $this->meta_title = $operate . '分类';
        $this->display();
    }

    /**
     * 移动分类
     * 
     */
    public function move()
    {
        $to = I('post.to');
        $from = I('post.from');
        $res = M('Category')->where(array(
            'id' => $from
        ))->setField('pid', $to);
        if ($res !== false) {
            $this->success('分类移动成功！', U('index'));
        } else {
            $this->error('分类移动失败！');
        }
    }

    /**
     * 合并分类
     * 
     */
    public function merge()
    {
        $to = I('post.to');
        $from = I('post.from');
        $Model = M('Category');
        
        // 检查分类绑定的模型
        $from_models = explode(',', $Model->getFieldById($from, 'model'));
        $to_models = explode(',', $Model->getFieldById($to, 'model'));
        foreach ($from_models as $value) {
            if (! in_array($value, $to_models)) {
                $this->error('请给目标分类绑定' . get_document_model($value, 'title') . '模型');
            }
        }
        
        // 检查分类选择的文档类型
        $from_types = explode(',', $Model->getFieldById($from, 'type'));
        $to_types = explode(',', $Model->getFieldById($to, 'type'));
        foreach ($from_types as $value) {
            if (! in_array($value, $to_types)) {
                $types = C('DOCUMENT_MODEL_TYPE');
                $this->error('请给目标分类绑定文档类型：' . $types[$value]);
            }
        }
        
        // 合并文档
        $res = M('Document')->where(array(
            'category_id' => $from
        ))->setField('category_id', $to);
        
        if ($res !== false) {
            // 删除被合并的分类
            $Model->delete($from);
            $this->success('合并分类成功！', U('index'));
        } else {
            $this->error('合并分类失败！');
        }
    }
}
